This is the sixth film produced by Fox with Warner Oland as the detective, and the second not to be lost, after The Black Camel (1931).

A young English man is convicted of the murder of one Captain Hamilton of the Royal Air Force and sentenced to hang.

His sister and her fiancé, convinced of his innocence, ask visiting detective Charlie Chan to investigate and find the real murderer.

In order to solve the mystery, Chan must visit a lavish English country manor house, where the suspects vary from the housekeeper to a lawyer.

Events soon indicate that the murderer is still actively trying to avoid capture, but Charlie Chan must set a trap to reveal the criminal's identity.